1225241305 has 4 divisors (see below), whose sum is σ = 1470289572. Its totient is φ = 980193040.

The previous prime is 1225241299. The next prime is 1225241321. The reversal of 1225241305 is 5031425221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5031425221 = 5281 ⋅952741.

It can be written as a sum of positive squares in 2 ways, for example, as 397643481 + 827597824 = 19941^2 + 28768^2 .

It is not a de Polignac number, because 1225241305 - 2⁷ = 1225241177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225241305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122524126 + ... + 122524135.

It is an arithmetic number, because the mean of its divisors is an integer number (367572393).

Almost surely, 2^1225241305 is an apocalyptic number.

It is an amenable number.

1225241305 is a deficient number, since it is larger than the sum of its proper divisors (245048267).

1225241305 is an equidigital number, since it uses as much as digits as its factorization.

1225241305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245048266.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1225241305 is about 35003.4470445412. The cubic root of 1225241305 is about 1070.0577326406.

Adding to 1225241305 its reverse (5031425221), we get a palindrome (6256666526).

The spelling of 1225241305 in words is "one billion, two hundred twenty-five million, two hundred forty-one thousand, three hundred five".